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fablefox
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work unit length

i just noticed that the workunit length quickly rose from 1 hours 20 minutes to double that. and then double again into 4 hours, then 6, and now 8 hours (based on my laptop speed).

were work unit get combined (because the size for each download was few kb anyway).

is there any technical decision to do this?

just asking, trying to start a conversation.
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[Jun 30, 2015 11:10:54 PM]   Link   Report threatening or abusive post: please login first  Go to top 
Former Member
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Re: work unit length

Some WU's are faster than others. I have had some that ran for twenty minutes and then some that would run for several hours. The same on Android devices; some would complete in a dew hors whereas others would run for 10 hours. The current sets could just take longer and may not necessarily be an indication that all future ones will be that long. With this project allowing mobile devices, having long WU's does not bode well for them.
[Jul 1, 2015 2:38:04 AM]   Link   Report threatening or abusive post: please login first  Go to top 
Seoulpowergrid
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Re: work unit length

I've had to cancel some one my netbook as they won't start on time. Shame but they'll be sent to other people and I'll keep the machine on and busy with the OET project as they are the smallest runtimes for current projects here.
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[Jul 1, 2015 4:49:26 AM]   Link   Report threatening or abusive post: please login first  Go to top 
Former Member
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Re: work unit length

"With this project allowing mobile devices, having long WU's does not bode well for them."

This is the reason the techs are holding back the long running batches to the end, so the Androids can participate. When the really long ones are run, it might come to the hard decision to exclude this platform, but then maybe by then they've found a way to subdivide a single molecule run across multiple tasks. Hopes for something like that is really small... it's like sending one part to Host1, then waiting on the result to send to Host2 for the next part. A sequence like that really builds up active results underway [explodes the Result Status pages numbers, slowing down the system... was that not so with HCMD2?]
[Jul 1, 2015 9:45:32 AM]   Link   Report threatening or abusive post: please login first  Go to top 
Eric_Kaiser
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Re: work unit length

On my (fast) Androids I can see runtimes between 1 hour and up to 15 hours.
Longer runtimes than these may only be a problem for resends and the shorter deadline.
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[Jul 1, 2015 10:58:47 AM]   Link   Report threatening or abusive post: please login first  Go to top 
Former Member
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Re: work unit length

If my tablet is 'fast', in relative terms, longest logged since started the WCGDAWS v3 spin-off development [an Office app], got 11.14 hours as longest.

Batch 1019 I've seen now as highest.
[Jul 1, 2015 11:22:21 AM]   Link   Report threatening or abusive post: please login first  Go to top 
Former Member
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Re: work unit length

I've had to cancel some one my netbook as they won't start on time. Shame but they'll be sent to other people and I'll keep the machine on and busy with the OET project as they are the smallest runtimes for current projects here.


What buffer do you have set on the netbook? Even if it took 24 hours to run, there would be plenty of time to run them unless you have a very long buffer set on the netbook; which would be pointless to have more than a day of WU's set. Outages do happen but they are rare and very rare to last more than a day. Having multiple days is really just a waste.
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Seoulpowergrid
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Re: work unit length

So I recently installed Linux on my 2 core netbook (note: not notebook) and the WUs were 90 minutes ~ 2 hours per at that time (unsure how normal that is as I recently joined OET). I gave it a buffer of 3 days as it has no internet on weekends and it worked fine until the WUs started running 20 hours plus. The Boinc software has slowly caught on to what current runtimes are and hence how many in my buffer is doable but there is a backlog that is running right up against the deadline. In my opinion it is better to cancel a WU than to report it too late and it not count or risk having it partially run on some other CPU and then aborted by the server.
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[Edit 1 times, last edit by Seoulpowergrid at Jul 2, 2015 12:14:19 AM]
[Jul 2, 2015 12:09:14 AM]   Link   Report threatening or abusive post: please login first  Go to top 
Former Member
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Re: work unit length

We seemed to have reverted from batch 1048 to a bunch of 574+575. Maybe the lengthy ones that were held back, or other technical reason, or, maybe the housekeeping is being improved after the FA@H 'débâcle' [I have no kinder term for this], with 11K batches missed after inquiring multiple times, well before 'No more new work' and doing a premature ECD [Estimated Completion Date].
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[Edit 1 times, last edit by Former Member at Jul 18, 2015 10:49:11 AM]
[Jul 18, 2015 10:47:35 AM]   Link   Report threatening or abusive post: please login first  Go to top 
seippel
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Re: work unit length

Originally the indexer for OET1 had a sanity check limit of 100,001 work units in a batch. Because of the long run times for each VINA job for OET1, batches can actually exceed 100,000. When this happened, the indexer just skipped those batches. This was noticed very quickly, and the limit was adjusted and we indexed batches that were skipped for this reason. Batches are sent out in the order that they are indexed so we're now sending out work units from batches that had been skipped in indexing the first time around.

Seippel
[Jul 21, 2015 7:38:25 PM]   Link   Report threatening or abusive post: please login first  Go to top 
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